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(No Model.) 2 Sheets-Sheet 1.

I. T. DYER.

MEANS FOR GENERATING POWER AND RE-UTILIZING THE EXHAUST OF LOCOMOTIVES AND ENGINES.

No. 431225. Patented July 1, 1890.

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(No Model.) 2 SheetsSheet 2.

' I. T. DYER.

MEANS FOR GENERATING POWER AND RE-UTILIZING TIIE EXHAUST.

OE LOCOMOTIVES AND ENGINES.

No. 431,225. A Patented July 1, 1890.

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ISAAC T. DYER, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO ALEX- ANDER J. MCDONALD, OF SAME PLACE.

. MEANS FOR GENERATING POWER AND REUTILIZING THE EXHAUST OF LOCOMOTIVES AND ENGINES.

SPECIFICATION forming part of Letters Patent No. 431,225, dated July 1, 1890. Application filed December 31 l 1888. Renewed May 10, 1890. Serial No. 351,259. (No model.)

To all whom it may concern: ders and forces itinto the chamberD together Be it known that I, ISAAC T. DYER, of with such quantities of free. air, as is neces- Chicago, Cook county, Illinois, have invented sary to create in said chamber a pressure of certain new and useful Improvements in from fifty to sixty pounds to the square inch.

Means for Generating Motive Pressure for Preferably from the rear end of this chamber and Reutilizin g the Exhaust of Locomotives there is an outlet-pipe F, which leads downand Engines, of which the following is a full, ward therefrom into a coil of pipes G, placed clear, and exact description, reference being in the fire-box above the fire-bed in such p0- had to the accompanying drawings, and to the sition as not to interfere with the supplying 10 letters of reference marked thereon. of fuel thereto, and from this coil there is a Il'eretofore railroad locomotives and engines pipe G which leads and discharges into the have been driven by steam almost excluboiler. sively, for although lately considerable ex- In order to. obtain the necessary pressure perimenting has been done with gas and elecin chamber D and the boiler, the pumps are 15 tricity, yet neither of the latter have been operated at the round-house or station by adopted. hand or other outside agency. The fire is The object of my invention is to provide then started and the air in the boiler heated such improvements to the present steam 10- to such a degree as to increase the expansicomotive and engines that compressed air bility or pressure twofold, after which the air 20 may be utilized to drive them. This I do in is utilized to drive the machine in the same such a manner that should it be desired to manner as steam. Back-pressure into the operate by steam it could be done without coil G from the boiler is prevent-ed bya suitinterfering with my improvements, or they able valve in pipe G; but as the air is excould be used together in such manner'as to hausted from the boiler it is replenished by :35 materially reduce the consumption of fuel, the air which is heated in and discharged 5 and so as to reutilize the exhaust, substanfrom coil G. As the engine or locomotive tially as hereinafter fully described, and as moves, the pumps are Worked, and it is the illustrated in the drawings, in whichdesign to reutilize the exhaust-air from the Figure 1 is a side elevation of a locomotive cylinders by exhausting into pipes which lead -30 having my improvements applied thereto. to said pumps.

Fig. 2 is a longitudinal vertical section of the When much of a fire is used, it is advisasame. Fig. 3 is a transverse vertical section ble to prevent the possibility of burning of taken on the plane just back of the smokethe lines and walls of the fire-box. This is stack. easily accomplished by recourse to the well- 5 In the drawings, A represents the boiler, known expedient of suspending asuitable re- B the fire-box, and O the smoke-arch, of a ceptacle filled with water above the fire-bed locomotive constructed and arranged in the in the furnace. usual manner. As it is desirable to sometimes use the ex D represents a compressed-air chamber, haust to create the necessarydraft from the 0 which extends, preferably, from the cab to fire-box, I have conceived the idea of one 0 the smoke-arch of the locomotive, and surof the pumps pumping in only the cold free rounds and covers the upper half of boiler atmosphere and the other pump on the oppofrom side to side, as shown, The whistle, site side 7 pumping the exhaust back into sand-box, man-hole, and bell are placed upon chamber D. ThisI can easily do by putting 45 and are supported by the shell of this chama three-Way valve in the neck of theexher haust-nozzle under the smoke stack, which Secured, preferably, to each side of the forvalve is under the complete control of the ward end of the boiler is a pump E, operated engineer and can be operated by him so as and actuated as hereinafter fully described, to direct the exhaust to the pumps or up the 1 50 which takes the exhaust air from the cylinsmoke-stack. The pumps E are secured in IQ:

the position stated upon brackets projecting laterally from the boiler, and they are connected at their lower ends to the arms I) 12, projecting from the ends of the transverse rockshaft 0, which is suitably journaled in hangers depending from the boiler. This rockshaft 0 is actuated through the medium of link cl by an eccentric e on the axle 1-1 of the forward drive-wheel.

As it might not be desirable, in view of the accumulated pressure in chamber D, and for reasons hereinbefore alluded to, to operate both pumps at once, I have arranged it so that the engineer can stop one of them. This I do by putting a sleeve 9 on one end of the rock-shaft, which is loose on said shaft, and Which has the arm I) (which would otherwise be secured to the corresponding end of the rock-shaft) projecting from it. This sleeve is preferably journaled in the adjacent bearing and has its inner end serrated, so as to form a counterpart for the clutch H, which, by means of a suitable feather is permitted to move longitudinally, but which rocks with said rock-shaft. The clutch has a circumferential groove in its body, into which the inwardly-turned extremities of the forks or bifurcations of the end of .a bell-crank h enter, and the lateral arm of this bell-crank has connected to its end a rod 70, which runs back to the cab and can be manipulated by the engineer. The pump itself may consist of an ordinary cylinder with a piston having a piston-head with a valve in it, which on its downward stroke forces the air out frombet'ore it into the chamberD and draws in the air back of it. I prefer, however, to use the pumps for which I applied for Letters Patent December 26, 1888, Serial No. 279,597. I simply connect the connecting-rods a a to the upper walking-beam of the pump, as shown in the drawings.

The air-brakes and whistle can be operated by supplies of air under pressure from the chamber D as well as by the present system.

Cold air' could be used and the fire in the fire-box dispensed with by adopting some means to operate the pumps and maintain the pressure in the boiler whenever the 1000- motive is at a standstill.

It is apparent that the coil G could be dispensed with, and such heat as was imparted to the air in the boiler by the heated gases of combustion passing through the flues in transit from the fire-box to the smoke-arch alone be depended upon. In this event the chamber D as a cold-air reservoir would be useless, because the air could be pumped direct into the boiler.

If it should be desired to use steam and air together, this could be easily done and would result not only in an economy of fuel, but the volume of steam necessary would be greatly reduced. Should it be desired to utilize the air only in case of accident, or because of the water or fuel supplies giving out, my invention would be a great auxiliary to the present use of steam.

The system of feeding compressed air and reutilizing the exhaust of engines in generating a motive power could be used in heating apparatus of buildings, whether hot air, steam, or water be used. use set forth, however.

What I claim as new is 1. The combination, in a locomotive, with the boiler and fire-box, of the pumps E E, rock-shaft 0, links d, eccentrics e, and axle H of the forward drive-wheel, as and for the purpose set forth.

2. The combination, in a locomotive, with the boiler, fire-box, and compressed-air chamber, of the pumps E, rock-shaft c, sleeve g, having its inner end serrated, clutch H, link d, and eccentric c on the axle H of the forward drive-wheel, as set fort-h.

ISAAC T. DYER.

Witnesses:

PETER FISH, FRANK D. THOMASON.

I prefer it for the I 

